How to Wait all the signals?

See more:

C#2.0

C#

multi-threading

I have a thread as below:

private void SendResultOutThreadSub()
{
     bool ExitThread = false;

     while (!ExitThread)
     {
          //I need wait 8 signals from other 8 threads:
          //In [STAThread] attribute, I can't use WaitHandle.WaitAll
          //So I use ManualResetEvent.WaitOne(signal[i],-1,true)
          //but this thread seems slow response to my "Exit" button in outside,
          //which will set icKillAllThreads=1.
      //pls tell me how to solve this problem

      if(AllTheSignalIsOn)
      SendTheResultOut();

          // Check if processing must be terminated
          if (Interlocked.Equals(icKillAllThreads, 1))
          {
              // Set exit loop flag
              Console.WriteLine("Sending result out thread existed");
              ExitThread = true;
          }

     }
}

Can you help to improve my thread coding as above shown?

Before this, I will provide more info about my question:
My project is related with image processing. and I used 2 cameras, with 8 images grabbed by each camera. To decrease the whole processing time, I want to process each image once it was grabbed. In other words, I need process 16 images in total.
After processed, I need combine 2 cameras result (2 outputs, pass or fail) together, as "11", or "10", "00", "01" to other IO device.
In simple:

Camera1 grab 8 sequence images --> Process each images one by one --> If failed 3 times, then camera1 failed;<br />
Camera2 grab 8 sequence images --> Process each images one by one --> If failed 3 times, then camera2 failed;<br />
Send result output: Camera1 result+Camera2 result together;

Above code is for send result out.

1)I am not sure how to improve my send result out thread, as it need wait all the signals?
2)Previously I want to use

WaitHandle.WaitAll(signalArray,100,false)

, but the compiler shows error, as WaitAll only used in MTAThread. So I changed the Main() attribute from

[STAThread]

to

[MTAThread] 

(my coding environment is VS C# 2005). But as I have used some 3rd party ActiveX control, which can't be used under

[MTAThread]

, and I had to give up

WaitHandle.WaitAll();

3)I had some trial with WaitAll in console/WinForm application, it runs smoothly in normal state, but when I want to exit the code, seems it has less response to user input. Now I add an "Exit" button on the form, when it was clicked, it will call:

Interlock.Exchange(icKillAllThreads,1);

so you can see I did a check for icKillAllThreads value in above code.
Seems I know little about the 3rd parameters meaning for

public static bool WaitAll(
    WaitHandle[] waitHandles,
    int millisecondsTimeout,
    bool exitContext
    );

, can you show me more about this?

Thank you again.